通过练习，他的绘画技巧逐渐发展成熟。

With practice, his painting skills gradually ___develop.

他最近对摄影产生了兴趣。

He recently ___developed an interest in photography.

老师在课堂上详细阐述了这个问题。

The teacher ___develops this issue in detail during the class.

她学会了自己冲洗黑白照片。

She learned how to ___develop black-and-white photos at home.

他们在郊区开发了一片新的住宅区。

They are ___developing a new residential area in the suburbs.